#include <REGX52.H>
#include "LCD1602.h"
#include "DS1302.h"
#include "Key.h"
#include "Timer0.h"

unsigned char KeyNum=0,Mode=0,TimeSetSelect=0,Flag=0;

void TimeShow()
{
		DS1302_ReadTime();
		LCD_ShowNum(1,1,DS1302_Time[0],2);
		LCD_ShowNum(1,4,DS1302_Time[1],2);
		LCD_ShowNum(1,7,DS1302_Time[2],2);
		LCD_ShowNum(2,1,DS1302_Time[3],2);
		LCD_ShowNum(2,4,DS1302_Time[4],2);
		LCD_ShowNum(2,7,DS1302_Time[5],2);
}

void TimeSet()
{
		if(KeyNum==2)
		{
			TimeSetSelect++;
			TimeSetSelect%=6;
		}
		if(KeyNum==3)
		{
			DS1302_Time[5-TimeSetSelect]++;	
			if(DS1302_Time[0]>99){DS1302_Time[0]=0;}
			if(DS1302_Time[1]>12){DS1302_Time[1]=1;}
			if(DS1302_Time[1]==1||DS1302_Time[1]==3||DS1302_Time[1]==5||DS1302_Time[1]==7||DS1302_Time[1]==8||DS1302_Time[1]==10||DS1302_Time[1]==12)
			{
				if(DS1302_Time[2]>31){DS1302_Time[2]=1;}
			}
			else if(DS1302_Time[1]==4||DS1302_Time[1]==6||DS1302_Time[1]==9||DS1302_Time[1]==11)
			{
				if(DS1302_Time[2]>30){DS1302_Time[2]=1;}
			}
			else if(DS1302_Time[1]==2)
			{
				if(DS1302_Time[0]%4==0)
				{
					if(DS1302_Time[2]>29){DS1302_Time[2]=1;}
				}
				else
				{
					if(DS1302_Time[2]>28){DS1302_Time[2]=1;}
				}
			}	
			if(DS1302_Time[3]>23){DS1302_Time[3]=0;}
			if(DS1302_Time[4]>59){DS1302_Time[4]=0;}
			if(DS1302_Time[5]>59){DS1302_Time[5]=0;}
			DS1302_SetTime();
		}
		if(KeyNum==4)
		{
			DS1302_Time[5-TimeSetSelect]--;
			
			if(DS1302_Time[0]<0){DS1302_Time[0]=99;}
			if(DS1302_Time[1]<1){DS1302_Time[1]=12;}
			if(DS1302_Time[1]==1||DS1302_Time[1]==3||DS1302_Time[1]==5||DS1302_Time[1]==7||DS1302_Time[1]==8||DS1302_Time[1]==10||DS1302_Time[1]==12)
			{
				if(DS1302_Time[2]<1){DS1302_Time[2]=31;}
				if(DS1302_Time[2]>31){DS1302_Time[2]=1;}
			}
			else if(DS1302_Time[1]==4||DS1302_Time[1]==6||DS1302_Time[1]==9||DS1302_Time[1]==11)
			{
				if(DS1302_Time[2]<1){DS1302_Time[2]=30;}
				if(DS1302_Time[2]>30){DS1302_Time[2]=1;}
			}
			else if(DS1302_Time[1]==2)
			{
				if(DS1302_Time[0]%4==0)
				{
					if(DS1302_Time[2]<1){DS1302_Time[2]=29;}
					if(DS1302_Time[2]>29){DS1302_Time[2]=1;}
				}
				else
				{
					if(DS1302_Time[2]<1){DS1302_Time[2]=28;}
					if(DS1302_Time[2]>28){DS1302_Time[2]=1;}
				}
			}	
			if(DS1302_Time[3]<0){DS1302_Time[3]=23;}
			if(DS1302_Time[4]<0){DS1302_Time[4]=59;}
			if(DS1302_Time[5]<0){DS1302_Time[5]=59;}
			DS1302_SetTime();
		}	
		if(TimeSetSelect==0&&Flag==1){LCD_ShowString(2,7,"  ");}
		else {LCD_ShowNum(2,7,DS1302_Time[5],2);}
		if(TimeSetSelect==1&&Flag==1){LCD_ShowString(2,4,"  ");}
		else {LCD_ShowNum(2,4,DS1302_Time[4],2);}
		if(TimeSetSelect==2&&Flag==1){LCD_ShowString(2,1,"  ");}
		else {LCD_ShowNum(2,1,DS1302_Time[3],2);}
		if(TimeSetSelect==3&&Flag==1){LCD_ShowString(1,7,"  ");}
		else {LCD_ShowNum(1,7,DS1302_Time[2],2);}
		if(TimeSetSelect==4&&Flag==1){LCD_ShowString(1,4,"  ");}
		else {LCD_ShowNum(1,4,DS1302_Time[1],2);}
		if(TimeSetSelect==5&&Flag==1){LCD_ShowString(1,1,"  ");}
		else {LCD_ShowNum(1,1,DS1302_Time[0],2);}
}
void main()
{
	Timer0_Init();
	LCD_Init();
	LCD_ShowString(1,3,"-  -  ");
	LCD_ShowString(2,3,":  :  ");
	DS1302_SetTime();
	TimeShow();
	while(1)
	{
		KeyNum=Key();
		if(KeyNum==1)
		{
			if(Mode==1)
			{
				Mode=0;
				TimeSetSelect=0;
			}
			else
			{
				Mode=1;
			}
		}
		switch(Mode)
		{
			case 0:TimeShow();break;
			case 1:TimeSet();break;
		}
	}
}

void Timer0_Routine() interrupt 1
{
	static unsigned int T0Count;
	TL0 = 0x18;				
	TH0 = 0xFC;
	T0Count++;
	if(T0Count>=800)
	{
		T0Count=0;
		Flag=!Flag;	
	}
	
}